Tobacco pipe



Patented Nov. 6, 1945 UNITED STATESL'PATENT OFFICE TOBACCO PIPE Reinhold H. Mueller, St. Louis, and Gerald W. Fossieck, St. Louis County, Mo.

Application september 2s, 1943, serialNo. 504,192

3 claims. (o1. lai-.225)

This invention relates totobacco pipes. The object of the present invention is to provldea smokers pipe` whereby there is assured, due

to the ,structure thereof, a uniform dry, non-biting and cool smoke, and providing conditions for perfect combustion causing smoking tobacco to be burned to a clean, dry ash, thus leaving no wet tobacco and nicotine paste pin the bottom of the tobacco compartment of the pipe. bowl.

Afurther object of the invention is to provide a pipe bowl structurewherein a smoke flow is provided from the tobacco compartment of the Y pipe bowl to a chamber in an insert member which is vin co-axial alignment with and below the ltobacco compartment, and wherein the smoke is mixed with fresh air admitted upwardly through the bottom of said mixing chamber, and, frornwhich mixing chamber the `admixture of smoke and air is admitted into a circulating chamber concentric with the smoke and air mixing chamber, and nally admitted from the circulating chamber into the passage of the pipe stem and bit.

We are aware that efforts have been made to I construct pipes to deliver cool, dry smoke to the mouth of a smoker, to leave a dry ash in the to` bacco chamber, to provide nicotine sumps, and

otherwise produce a clean uniform smoke, butl we believe it is within the province of this disclosure to improve generally and to enhance the utility of tobacco pipes by preventing distillationV of thetobaccg in the bowl by providing perfect conditions of combustion, mixing air with the smoke below the combustion chamber, and then circulating the admixture of smoke and air introduced thereinto to secure a. dry,- clean, and cool smoke, and to provide a free draft at all times.

With the above and other objects in view, the invention consists in the novel features of con struction, combination and arrangement of parts hereinafter more fully described and nally` Fig. 5 is a bottom plan View of the insert` member.

Fig. 6 isa detail of the lower section of the two piece bowl section.

Fig. 7 is a View partly in elevation and partly in section, illustrating the pipe with a one piece bowl,

Referring to the drawing, thetobacco pipe embodying the features of our invention is illus-,

trated, generally, as comprising a pipe bowl made from suitable material, and which is divided into upper and lower compartments `in vertical co-V axial alignment with a grate therebetween, a hollow insert member held in position in the lower compartment and providing Within the ylower compartment a vertically disposed smoke and air mixing and coolingcha'mber in co-axial alignment with the upper or tobacco` chamber and an annularouter or concentrically arranged smoke circulating chamber in eommunicationwith the smoke and air mixing and cooling chamber, an air inlet directed into the smoke and air Ymixing and cooling chamber, a stem for the bowl, a bit removably connected with the stem, and which stem and bit have a passage in communication? with the smoke circulating chamber at a predetermined elevation of the smoke circulating chamber. f

HIhe bowl of the pipe can be made of .two sections suitably united, or it can be made as a'one piece bowl.

Referring, in detail, to the drawing, the refier-` ence character A designates, generally, a pipe bowl provided with a stem l. is removably connected with the stem l. stem and bit are provided with a continuous smoke passage designated 3.

As illustrated in one embodiment of the in' vention, as shown in Fig. 2, the bowl Ais formed of two sections, namely, a lower section 4, which includes the stem I, and an upper section 5.

The lower bowl section 4, which can be made from any suitable materiaLis provided with a vertical bore serving as "a compartment 6, which compartment, when the upper bowl section is removed, is open at both ends. portion of the wall of the bore, or compartment 6, is provided with suitable screw-threads designated l. The upper face of the lower bowlsection 4 is provided with an upright ringlike tongue 8.

The upper bowl section 5 which is preferably made of briar, is suitably bored out to provide a, tobacco chamber 9 having its lower end closed,4

, and provided with a.' plurality of small smoke openings l0 so as .toform a grate Il. The wall:

A suitable bit" 2 The The lower en d.

of the. upper bowl section is milled out from the lower face thereof upwardly to provide an annular space, or groove I2, into the lower end of which the ring like tongue 8 of the lower bowl section 4 tightly ts to provide a tongue and groove connection between the lower and upper pipe bowl sections 4 and 5. Thus assembled, there is formed the lower and upper compartments 6 and 9, respectively, in vertical axial alignment. The space, or groove I2 'in the Vupper bowl section 5 can, if desired, be lled with suitable insulating material I2', or `used merely as a dead air space. Thus heat generated in the combustion chamber is not transmitted in its `entire-ty to the exterior of the pipe bowl. This is conducive to a more comfortable handling of the pipe.

The insert member, designated, generally as B,

, can be made of any suitable material, such as wood, plastic, or other desirable material, and, in general is of spool shape, except that the bore, or chamber I3, which is centrally disposed and serves as a smoke and air mixing and cooling chamber, has a closed lower end I4, but is open at the top. The upper and lower ends of the insert member B can be anged outwardly, as at I5 and I6, respectively. The upper ange I5 on the insert member B can be eliminated, if so desired,` and as clearly illustrated in Fig. '7. The lower flange I6 is provided with suitable screwthreads I'I for threaded engagement with screwthreads I in the wall of the lower compartment 6 of the pipe bowl A, thus being removable there from when desired for cleaning the lower pipe bowl compartment 6, whether the bowl is made in one piece or two sections.

A suitable air nozzle I8 is secured to, or integral with the bottom wall of the insert member B, and it projects upwardly a predetermined distance into the central chamber I3 of the insert member. The side wall of the insert member B is provided with a suitable smoke outlet I9. When the insert member B is positioned in the lower chamber 6 of the pipe Abowl A, there is provided an annular chamber 20 concentric with the insert member chamber I3, and this serves as a smoke circulating chamber for the air cooled smoke from chamber lf3 to travel through and around the mixing and cooling chamber before entering the smoke passage 3 in the pipe stem and bit.

The lower ends of the smoke and air mixing chamber I3 and the circulating chamber 2B, respectively, serve as nicotine or moisture sumps, which are readily cleaned out upon removal of the insertmemberB from the lower pipe bowl chamber 6.

If the pipe bowl A is a two piece structure, as shown in Fig. 2, andthe upper bowl section 5 is detached from the lower bowl section, and the insert member B is removed from the chamber 6 of the lower bowl section 4, the chamber 6 will be open at both ends for readily and easily cleaning thereof, whereas, the insert member can then also be readily and easily cleaned.

When the pipe bowl A is made of two sections,

the lower pipe bowl section 4, its stem I, as well as the insert member B can be formed of plastic material, if so desired, or any other suitable and desirable material.

In our pipe construction, it is however, essential that the vertically disposed smoke and air mixing chamber be in co-axial alignment with the tobacco chamber, and that there'be formed a smoke circulating chamber concentric with the smoke and air mixing chamber so as to also be in cofaxial alignment with the tobacco chamber, thus smoke is drawn downwardly from the tobacco chamber through openings II intothe insert chamber I3 where it is mixed with a fresh intake of air through .fthe air nozzle I8. The mixed air and smoke is then drawn through a suitably located outlet in the Wall of the insert member B, preferably toward the front of the pipe bowl and circulated within the chamber 20 which is concentric with chamber I3 so as to be forced to flow around the chamber outside the insert member before it passes through and out of the stem and bit passage 3, which can communicate with the smoke circulating chamber 20 at any desired or predetermined elevation thereof.

While we have shown both a one pieceand a two piece pipe bowl structure, it is manifest that the principle of the smoke ilow is the same in either instance, as the chamber constructions 6 and 20 remain the same, that is, a vertically disposed smoke and air mixing chamber 6 that is in co-axial alignment with the tobacco chamber and a smoke circulating chamber 20 that is concentric with the smoke and air mixing chamber 6 and also in co-axial alignment with the tobacco chamber, and which smoke circulating chamber is in direct communication with the stem and bit passage 3 at a predetermined elevation of the smoke circulating chamber 23.

The many advantages of the hereindescribed invention will readily suggest themselves to those skilled in the art to which the invention relates, and by smoking the pipe, it will be readily apparent to the average pipe smoker by delivering a surprisingly smooth, dry and cool smoke which is so much desired.

From the foregoing description, it is evident that a simple pipe construction has been disclosed, but it is to be understood that we do not desire to restrict, or limit ourselves to the very details of the construction shown and described,

" of the appended claims.

What we claim is: 1. A smoking pipe having, in combination, a lowerbowl section, said section having a vertical bore normally open at its ends, internal screwthreads at the lower end of said bore, an upwardly projecting ringlike tongue on the upper face of the said section, a stem projecting from said bowl section having asmoke passage centrally of the outer end of the stem and leading from the bore of the bowl section adjacent the upper edge thereof, an upper bowl section, said upper section having a ilat bottom face, and thereabove a tobacco cavity, an annular space surrounding the major portion of the tobacco cavity and open at its lower end, heat resisting material within said space except for a minor part thereof to provide an annular groove in the lower flat face of the upperv bowl section to tightly receive the tongue of the lower bowl section, said upper bowl section having a small diameter central downdraft smoke opening and a plurality of like openings spaced therefrom with all of openings open to the lower flat face of the upper bowl section and open to the tobacco cavity, a hollow insert member, the major length thereof from the top downwardly being of less diameter than the bore of lower bowl section, the remaining length of the insert member being of greater diameter than said last mentioned bore and provided with external screw-threads adapted to engage the aforesaid internal screw-threads when the insert member is inserted into the lower bowl bore causing the upper face of the insert member to contact the lower flat face of the upper bowl section surrounding the downdraft openings to provide a mixing chamber below said openings and to provide' an annular chamber surrounding the insert memn ber, an updraft fresh air opening central of the bottom of the insert member, and a smoke outlet opening in the side wall of the insert member so disposed as to cause the smoke to travel around the insert member before entering the smoke passage to the stem leading from the wall of the bore of the lower bowl section.

2. A lower bowl section for a smoking pipe of the separable bowl type, said lower bowl section having a vertical bore normally open at upper and lower ends thereof, internal screw-threads at the lower end of the bore ofsaid section, an upwardly projecting ring-like tongue on the upper face of the lower bowl section, a stem projecting from the lower bowl section having a smoke passage centrally of the outer end of the stem and leading from the bore of the bowl section adjacent the upper edge portion thereof.

3.- An upper bowl section for a smoking pipe of the separable bowl type, said bowl section having a flat bottom face, a tobacco cavity, an annular space surrounding the major portion of the*f tobacco cavity and open at its lower end, a heat resisting material disposed within said space except for a minor part thereof to provide an annular groove in the lower face of the bowl section, and said bowl section having a small diameter central draft opening and a plurality of like diameter draft openings spaced therefrom with all of said draft openings open to the lower face of the bowl section and open to the tobaccocavity.

REINI-IOLD H. MUELLER. GERALD W. FOSSIECK. 

